Not so much in coloring books, but in Cubase. Suppose I have some event selected, and I forgot about it. I need to colorize several tracks, so I click on the first one, then press shift and click on the last one. This action doesn’t deselect the event that was previously selected in the timeline.
So with all the tracks selected, I press Alt (in macOS), and click in the area of the track on the left, the one that has the color and also the icon that says what type of track it is, a MIDI, instrument, folder, etc. That gives me the list of colors I setup in the project colors.
So I choose a color, and that turns the track colors and their respective events into the color I selected. But it also colors that event I had selected earlier and forgotten about. I find this nonsensical. If I’m selecting several tracks, and apply a color to all of them, why would it also apply that color to an event that is not part of any of the selected tracks?